.navwrap {
  height: 42px;
  padding: 0 24px;
  background-color: #fff;
  line-height: 42px;
  display: flex;
  justify-content: space-between;
}

.left {
  width: 150px;
  height: 42px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 20px;
  position: relative;
}

.left::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border: 12px solid;
  border-color: #fff transparent transparent transparent;
}